Changes for page ROS Crash Course

Last modified by Leon Poon on 2021/08/30 23:24
From version 6.1
edited by Leon Poon
on 2021/08/30 23:24
Change comment: There is no comment for this version
To version 5.1
edited by Leon Poon
on 2021/08/23 11:08
Change comment: There is no comment for this version

Summary

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Content
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101 101  quick reading of code for publisher node
102 102  
103 103  homework: implement message subscriber node according to ROS book
104 -
105 -== Day 4 ==
106 -
107 -message subscriber.
108 -
109 -argc and agrv
110 -
111 -node name during ros::init
112 -
113 -topic advertise/subscribe explained.
114 -
115 -subscribe() only memorises that this node wants messages and what to do with them.
116 -
117 -subscribe() - providing name of function. not calling.
118 -
119 -publisher while ros::ok() loop.
120 -
121 -subscriber spin() loop - handle events.
122 -
123 -the double-colon operator: (1) namespace (2) static member of class
124 -
125 -pointers are memory addresses
126 -
127 -arrow -> operator
128 -
129 -array are elements in sequence in memory.
130 -
131 -char ~*~* = pointer of pointer of char data.
132 -
133 -
134 -